The full config isn't held in memory, nor any parts of the actual config.xml that are usable. Your firewall rules should be accessible in /tmp/rules.debug maybe, may have to run "pfctl -vvsr" to get the list. That's the list in PF syntax though, it'd just be a reference you could use to recreate from scratch once you're on a fixed hard drive. Other services have config files in a variety of places but mostly on disk, the configs they're running with now that the disk is gone aren't extractable. Unfortunately you're probably stuck with the exception of the firewall rules.